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marta [7]
2 years ago
5

-2(x+5)=4 please solve

Mathematics
2 answers:
marshall27 [118]2 years ago
5 0

-2(x+5)=4

-2(x) = -2x

-2(5) = -10

-2x-10=4

-2x=4+10

-2x=14

x=-7

aliya0001 [1]2 years ago
4 0

Answer:

x=-7

Step-by-step explanation:

-2(x+5)=4

-2x-10=4

-2x=14

2x=-14

x=-7

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Remember you can do anything to an equation as long as you do it to both sides
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500-2a=388
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Last year there were 30 booths at the carnival. This year there are 20% fewer booths. How many booths are there this year?
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3 in<br> 2.7in<br> 8.65 in<br> cubic inches <br> What’s the volume
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3 years ago
Answers fast please. 1.) y=x−63x+2y=8 Use the substitution method. A.) (4, −2) B.) (14, 8) C.) (0, −6) D.) (3, −3) 2.) What is t
GrogVix [38]

<u>QUESTION 1</u>

The given system of equation is

y=x-6...eqn1

and


3x+2y=8...eqn2


Let us substitute equation (1) into equation (2) to get,

3x+2(x-6)=8


We expand the bracket to get,

3x+2x-12=8


We simplify to get.

5x-12=8


We group like terms to get

5x=8+12

\Rightarrow 5x=20

\Rightarrow x=4


We now substitute x=4 in to equation (1) to obtain,


y=4-6=-2


The correct answer is option A.


<u>QUESTION 2</u>

The given system of equations is

y-x=9...eqn1


and

10+2x=-2y...eqn2

We make y the subject in equation (2) to get,

y=-x-5..eqn3


We put equation (3) into equation (1) to obtain,


-x-5-x=9


We group like terms to get,

-x-x=9+5


This implies that,

-2x=14


We divide through by -2 to get,

x=-7


Hence the x-coordinate is -7



<u>QUESTION 3</u>

The given system is

y=3x-1..eqn1


and


x-y=-9...eqn2

We make x the subject in equation (2) to get,

x=y-9...eqn3


We put equation (3) into equation (1) to obtain,


y=3(y-9)-1


We expand the bracket to get,


y=3y-27-1


Group like terms to get,


y-3y=-27-1


We simplify to get;

-2y=-28


This implies that,

y=14


Therefore the y-coordinate is 14.

4 0
3 years ago
Read 2 more answers
Write an equation for the ordered pairs (0,5) (1,0)
Phoenix [80]
M=0-5/1-0
m=-5/1=-5
y-y1=m*(x-x1)
y-5=-5(x-0)
y-5=-5x
y=-5x+5
7 0
3 years ago
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